#include <stdio.h>  

int main() 
{
    int year;
    for (year = 1000; year <= 2000; year++)
    {
        if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0))
        {
            printf("%d\n", year);
        }
    }

    return 0;
}